Glossary
A
ABR Area Border Router. A router using OSPF in which the router has interfaces in multiple OSPF areas.
access link In Frame Relay, the physical serial link that connects a Frame Relay DTE, usually a router, to a Frame Relay switch. The access link uses the same physical layer standards as do point-to-point leased lines.
access rate See AR.
ACL Access control list. A list configured on a router to control packet flow through the router, such as to prevent packets with a certain IP address from leaving a particular interface on the router.
administrative distance In Cisco routers, a means for one router to choose between multiple routes to reach the same subnet when those routes are learned by different routing protocols. The lower the ...
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